Details
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Task
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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None
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None
Description
ZStandard compression was added in MySQL 8.0 but is currently not supported by MariaDB Connector/C.
MySQL indicates ZStandard compression support by setting CLIENT_ZSTD_COMPRESSION flag (1UL << 26).
For using ZStandard compression the client set's CLIENT_ZSTD_COMPRESSION flag, instead of CLIENT_COMPRESS (=zlib compression) flag.
In addition to the capability flag, the client will send a 4 byte (unsigned integer) after connection attributes which specifies the compress level:
Client Handshake Response:
...
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if (server_capabilities & CLIENT_CONNECT_ATTRS)
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int<lenenc> size of connection attributes
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while packet has remaining data
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string<lenenc> key
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string<lenenc> value
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*NEW*
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if (server_capabilities & CLIENT_ZSTD_COMPRESSION)
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int<4> compression level
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Attachments
Activity
| Field | Original Value | New Value |
|---|---|---|
| Summary | Support for zstd compression | Support for (MySQL) zstd compression |
| Description |
ZStandard compression was added in MySQL 8.0 but is currently not supported by MariaDB Connector/C.
MySQL indicates ZStandard compression support by setting CLIENT_ZSTD_COMPRESSION flag (1UL << 26). For using ZStandard compression the client set's CLIENT_ZSTD_COMPRESSION flag, instead of CLIENT_COMPRESS (=zlib compression) flag. In addition to the capability flag, the client will send a 4 byte (unsigned integer) after connection attributes which specifies the compress level: *Client Handshake Response:* {noformat} if (server_capabilities & CLIENT_CONNECT_ATTRS) int<lenenc> size of connection attributes while packet has remaining data string<lenenc> key string<lenenc> value if (server_capabilities & CLIENT_ZSTD_COMPRESSION) int<4> compression level {noformat} |
ZStandard compression was added in MySQL 8.0 but is currently not supported by MariaDB Connector/C.
MySQL indicates ZStandard compression support by setting CLIENT_ZSTD_COMPRESSION flag (1UL << 26). For using ZStandard compression the client set's CLIENT_ZSTD_COMPRESSION flag, instead of CLIENT_COMPRESS (=zlib compression) flag. In addition to the capability flag, the client will send a 4 byte (unsigned integer) after connection attributes which specifies the compress level: *Client Handshake Response:* {noformat} ... if (server_capabilities & CLIENT_CONNECT_ATTRS) int<lenenc> size of connection attributes while packet has remaining data string<lenenc> key string<lenenc> value *NEW* if (server_capabilities & CLIENT_ZSTD_COMPRESSION) int<4> compression level {noformat} |
| Resolution | Fixed [ 1 ] | |
| Status | Open [ 1 ] | Closed [ 6 ] |